Improvement in gauges for turning clock-work



HENDERSON & LADD.

GAGE FOR TURNING cLoc-K WORK.

No. 110,460. Patented Dec. 27, 1870.

HARRY- n. HENDERSON Letters Patent No. 110,460, dated December 27, 1870 ante dated December 24', 1870.

IMPRQVEMENT IN GAUGES FOR TURNING CLOCK-WORK.

i'heschedule referred to in the'se Letters Patent and making part of the same.

We, HARRY F. HENDERSON and J was E. Lam), of Bristol, in the county of Hartford and State of Connecticut, have invented a new and useful Improvement in Gauges for Turning Glock-W'ork, of which the following is a specification.

Our invention consists of a circular gauge, mounted on a'shaft and provided with adjusting mechanism, and a clamp for securing the same to the turningtool of an ordinary clock turuers lathe, as hereinafter fully described.

In the accompanying drawing- Figure l is a top .view of our invention Figure 2, a side elevation of the same; and.

Figure 3, a top view of the ordinary markinggauge.

A designates ashaft, usually termed a clock-pinion, which is provided with two collets for the insertion of the needles which form the lantern-pinion.

The wheel-collet S is provided with a teuon, a, to which a wheel is to be secured.

These collets are always the first part of the work to be turned, when the shoulders formed by the bearings, (one of which is represented at a: in fig. 1,) on each end of said shaft are gauged from the tenou a, so as to bring the wheel in its proper position between the shoulders, and, consequently, between the two plates of the clock-movement. 1

B designates a portion of the usual slide-gauge used by clock-tnrners, which gauge governs and holds the chisel O. Y b designates a' post, the under side of which is slotted to receive the chisel G, and is secured thereto by set-screw 0.. I

Theipost b is provided with a 'socket and set-screw, c, for adjusting and securing the shaft d.

On the end of shaft d is a tube, 0, in which ,1 slides the shaft D.

By suitable set-screws, two collars, -f' f are secured to the shaft 1), the collar f retaining the spiral spring g in place, while the collar f is provided .with a pin, which slides in an arm, i, of the-tube e, and prevents the turning of said collar, and, if its set-screw is tightened, prevents the turning of the shaft D.

One end of the shalt Dphas a threaded hole, in

which is a screw, j, which screw is provided with a set-nut, It.

l designates a disk attached; to the end of screw j,

and which disk constitutes the gauge l.v

This gauge 1 might be of other form, in .which case the hole through the end of the shaft D should be large enough to allow the free passage of the screw j, which should be held in place by two set-nuts, so that the screw may be adjusted laterallywithout revolving the gauge 1.

The operation is as followst The shaft A is revolved in an ordinary clock-turners lathe. For turning the bearing on the left-hand end of the shaft A, the chisel is placed on its usual supports in front of the work, the gauge] being preof the chisel, and the whole of the gaugingdevice secured to the chisel, so that the gauge l (as thrown back by the spring 9) will pass the wheel-.collet S without contact with it, when the operation com presses the spring 9 by pressure on the end of shaft D, thus throwing said shaft and the gauge 1 forward until it engages with the shoulder of the tenon a, and the chisel-point-enters the shaft A at the juncture of the hearing andshaft, when the pressure on the end of the shaft 1) is released, and the spriugig withdraws the gauge Zfroiu the wheel-collet S, as shown in fig.

1, aud allows it to pass thesame when the chisel is moved to the'left, and a bearing turned similar to the bearing shown at x. For turning the hearing -on the right-hand end of shaft" A, the sliding shaft D may be dispensed with, as there are no obstructions between the startingpoiut of: the gauge 1, and'the point to which it moves in turning the bearing. v

If desired, the shaft D might bearranged to slide through thesl-idegauge B,instead of the tube 6, when its operation would be the same.

Ordinarily, the shoulders formed by the bearings are governed by'first marking the shaft witha tool, which consists of a flat piece of steel, E, fig. 3, having two points anda slot to admit-the collets.

.The shoulder in plate E formed by one side of the slot is placed on the tenon-shoulder a, when the points scratch or mark the position of the shoulders for the bearings.

The turner then turns the hearings to the marks as near as he can, but more or less difference, even with the best of turuers, is always the result.

' By our invention the labor of marking previous to turning is dispensed with, while the work is much more accurate than ordinarywork, which enables the movements to be puttogether at a reduced cost.

We claim as our invention- The improved gauging-tool herein described, consisting'essentially of the shafts D d, socketed post 11,

tube e, collars f f, spring 9, screw and nut j k, and gauge disk l, constructed and combined substantially as herein described.

HARRY F. HENDERSON. JAMESv E; LADD.

Witnesses:

Anens'rmn .Non'ron, OHAs. T. Foocrn.

em (tffid.

AND, JAMESf--E. LADD, or BRISTOL, CONNECTICUT.

viously adjusted to the desired distance from the point i 

